Abstract: The subpixel dynamic imaging technique will be one of the most effective new methods to minimize optical remote-sensors.It is importent and necessary to studying the modulation transfer function of subpixel dynamic imaging system. The fundamental concept and image formation of the subpixel dynamic imaging system are introduced.In this paper, the numerical analysis of MTF of subpixel imaging system is discussed, and the advantages of subpixel dynamic imaging system is pointed out.